Should I add more?
The effectiveness of added insulation is proportional to how “bad” the original condition is. In other words, while you'll save some heating costs every time you raise your insulation to a higher R-value, you'll gain the most savings by starting with a component that has no insulation. For example, you'll see a 90 percent improvement going from no floor insulation to R-19, but only a 36 percent improvement upgrading from an R-19 to an R-30.
To help you know where to start weatherizing first you might want to try out our home energy calculators to see what is recommended for your home.
Other free resources:
Check The Energy Adviser articles for more weatherization information.
There is a brochure available on "Reducing Home Air Leaks" that is worth reviewing. You'll find it (and other interesting brochures) listed on our order form.